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Overview: Smart Tool Box offers you the ultimate tool box app with 30 powerful smart tools in the box. It is almost a must to have it on your phone, like carrying a swiss army knife.

1. Ruler

Measure dimensions and angles of different objects. No calibration needed.

2. Level meter

Check the surface levels.

3. Smart speedometer

Displays you the speed on a racing-style gauge using GPS. It also records maximum speed, average speed, traveled distance and a current slope.

4. Smart distance meter

Measure distance and height of different objects using smart algorithm.

5. Protractor

Measure the slope of any object using your camera and imaginary weight.

6. Smart speed gun

Measure speed of moving objects using smart algorithm.

7. Smart converter

Convert between different currencies and physical units. Currencies are updated automatically.

8. Compass

Will help you discover the right direction.

9. Location (map)

Shows your current location on the map, current GPS coordinates and the altitude.

10. Stopwatch

Measure the time accurately. It also includes the countdown option.

11. Metal detector

Detect magnetic field of nearby materials and observe it on real time chart.

12. Vibrometer

Observe real time seismograph data, based on Richter scale. The algorithm is auto-calibrating.

13. Luminosity meter

Measure the environmental luminosity (Lux).

14. Color sensor

Capture the color of any object in RGB format through your camera.

15. Cardiograph

Measure your heart rate with a camera and observe a real time pulse chart. Smart algorithms are used to filter the noise.

16. Smart sound meter

Monitor the current sound pressure level and its spectrum.

17. Pitch tuner

Tune the pitch of your voice or musical instruments. It can also play the corrected tone.

18. Metronome

Classic metronome with adjustable tempo.

19. Thermometer

Displays current temperature, humidity and air pressure.

20. Drag Racing

Measure the performance of your vehicle. You can switch between different acceleration and brake tests. It includes an auto start/stop function and a chart.

21. Battery tester

Test your device's battery.

Tools support both unit formats (metric/imperial) and several languages. However, not all devices have the appropriate sensors to support all the tools. The app is tested mostly on Samsung, LG, HTC and Toshiba phones. Feel free to email me if you find any bugs or need any help with the tools. Please note that it is a free app with some unobtrusive ads.